ven in the paragraph below to answer the five questions that follow The ITDS gra

Question

ven in the paragraph below to answer the five questions that follow The ITDS grade recei which it chooses grou Learn attendin department wants to see if different teaching methods make a difference on the overall by students in a particular course. So the Department conducts a research in ve an honor class with 30 students to be divided to three equal groups. The first p receives the lectures in a face-to-face class, the second group uses the online Hawkes ing System for learning the lessons, and the third group uses both methods that means o the class and using Hawkes Learning online platform in parallel. The data are taken rom the class roll, and is a numeric grade from 0 to 100 for each student in each group Anova: Single Factor SUMMARY Groups Group 1 Group 2 Sum Average Variance 79.4 99.82222 Count 10 10 10 861 86.1 47.65556 794 765 76.5 127.1667 ANOVA Source of Variation Between Groups Within Groups MS 484.8667 2471.8 27 91.54815 29 Total 13. The correct null hypothesis to test if the grades differ by group is: A. Ho: All mean scores differ from each other. B. Ho: All mean scores are equal (same). C. Ho: Several of the mean scores differ from each other. D. Ho: Mean for Group 3 is greater than that for the other groups E. Ho: Not all mean scores are equal. ha 10%, level of significance .. 'AI , A

Explanation / Answer

13) Option B is correct

H0: All mean scores are equal

SV SS df MSS F Between Grps 484.8667 2 484.8667/2 =242.43335 2.6481 Within Grp 2471.8 27 91.54815 Total 2956.6667 29

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